Elemental composition of low energy Galactic cosmic raysThis paper describes new measurements (at about 100 MeV/n) of elemental ratios in cosmic rays, made from Voyager 2 at about 22.5 AU. These data are characterized by a very low level of solar modulation, which results from the combination of the 1986-1987 solar minimum period and the large heliocentric distance. The data were obtained from one of the two HET telescopes on board Voyager 2, collected during 1986 and 1987; the charges were derived from a double dE/dx vs E analysis. The results on the secondary/primary elemental ratios are presented along with previous results obtained at 1 AU by IMP-8 and ISEE-3.
Document ID
19900044804
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ferrando, P. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lal, N. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mcdonald, F. B. (NASA Goddard Space Flight Center Greenbelt, MD, United States)